I've always wondered why there is such a humongous bypass on SB's (must be an engineering good reason). I think a person could restrict that "some" but not all the way unless a person is running no stat like in circle tracks so that that amt is cooled but a functioning system cools OK with it operational so lets find the problem. Did you say you are or are not running a restrictor? I'm with cooling guru Sanborn who says emphatically NO restrictors. People have said that the coolant can flow thru too fast to be cooled, well consider this: if one block of coolant moves thru the rad faster (& gets cooled less) then the next block arrives faster (& starts getting cooled sooner!) so it balances out. Al are you having an overheating issue? high speed or around town? shroud or no shroud? fan distance from rad or into schroud? recent issue? any recent tuning or part changes? happened all of a sudden?
